package br.unipar.academico.filtro;

import br.com.uniti.academico.persistence.entity.Usuario;
import br.unipar.academico.jsf.cadastroaluno.UsuarioController;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ExemploFiltro implements Filter {

    @Override
    public void init(FilterConfig fc) throws ServletException {
    }

    @Override
    public void doFilter(
            ServletRequest request,
            ServletResponse response,
            FilterChain chain) throws IOException, ServletException {
        
        HttpServletRequest req = (HttpServletRequest) request;
        HttpServletResponse resp = (HttpServletResponse) response;

        Usuario usuarioSession =
                (Usuario) req.getSession().
                getAttribute(UsuarioController.USUARIO_SESSION);

        if (usuarioSession != null) {
            chain.doFilter(request, response);
            return;
        }

        //PrintWriter writer = response.getWriter();
        //writer.write("SEM ACESSO. Voce Foi Filtrado.");
        //writer.close();

        req.getRequestDispatcher("/").forward(request, response);

    }

    @Override
    public void destroy() {
    }

}
